圆槽盘式磁流变液制动器的设计研究

摘要

Insufficient braking torque of magneto-rheological fluid (MRF)brake is always a key factor restricting the application of MRF brake.In this paper,by adding semicircular grooves and ridges on the surface of the conventional brake disc,the working area of the brake disc is increased and the braking torque of the MRF brake is increased.The model of the braking torque with the combination of the ridge and the groove is established,and the parameters influencing the torque are obtained.The location of the center of the ridge is obtained by the mathematical derivation method.The magnetic field of the working gap of the circular groove brake disc is analyzed by ANSYS electromagnetic module to determine the size of the ridge.The research results show that the brake torque of the circular groove disc-type MRF brake is improved by 33％ compared with that of the conventional disc-type MRF brake.%磁流变液制动器制动力矩不足始终是限制磁流变液制动器实际应用的主要原因.本文通过在普通制动盘的表面增加半圆形凹槽和凸脊,增大制动盘的工作面积进而增大磁流变液制动器的制动力矩.建立凸脊与圆槽配合制动的制动力矩的模型,得到影响力矩的参数.通过数学求导法求得凸脊的圆心位置,采用ANSYS中的电磁模块对圆槽式制动盘工作间隙处做磁场分析,确定凸脊的尺寸.综合制动面积和磁感应强度的变化结果,本文设计的圆槽盘式磁流变液制动器制动力矩相比于普通盘式磁流变液制动器的制动力矩提高了33％.